Such efforts have led to the development of so-called "relaxed" molecular clocks, which allow the molecular rate to vary among lineages, albeit in a limited manner. There are currently two major ...

Until now, at least 14 different species have been assigned to the genus Homo since it emerged in Ethiopia some 2.8 million ...

Lineages unable to develop the required phenotype were eliminated and replaced by successful ones, creating conditions for selection to hone traits that are adaptive at the level of lineages.

Historically, cell lineage tracing studies have taken large pools of cells from mature tissues and inferred their origins retrospectively by staining the cells with vital dyes or transplanting ...

A newly studied Vegavis iaai skull from Antarctica confirms that modern bird lineages, like ducks and geese, were evolving alongside non-avian dinosaurs. This study supports Vegavis' placement in the ...

At Jamestown, Virginia, ancient DNA revealed the complex dog lineages between Indigenous dogs and the dogs brought by European settlers. Researchers from the University of Illinois Urbana ...

The new findings contradict previous assertions that Ashkenazi mitochondrial lineages originated in the Near East, or from mass conversions to Judaism in the Khazar kingdom, an empire in the north ...